浙江汤浦水库浮游植物季节演替及其影响因子分析

发布时间：2018-03-16 05:12

本文选题：浮游植物　切入点：时空动态　出处：《环境科学》2016年12期 　论文类型：期刊论文

【摘要】：为探索我国亚热带饮用水源水库浮游植物时空变化特征及其影响因素,2011年对汤浦水库浮游植物和22项水文水环境因子进行月度监测.结果表明,调查期间共检出浮游植物7门62属115种,其中绿藻种类最多,硅藻其次;春季水华期间(4月)浮游植物细胞密度达到最高20.88×10~6cells·L~(-1),随后因强降雨影响降至最低0.59×10~6cells·L~(-1)(6月);浮游植物群落组成的时间异质性比空间异质性更为明显,其时空方差分解的结果显示,时间变异占总变异的72.3%,大于仅占2.5%的空间变异;优势种和冗余分析(RDA)表明,硅藻全年优势最为明显,其次是蓝藻和隐藻,再次是绿藻,其中春季由硅藻和蓝藻占优势,夏季由蓝藻和绿藻占优势,秋季和冬季则由硅藻和隐藻占优势;HRT及其驱动的水库离子浓度变化和反硝化过程是主导春季和秋季水体扰动耐受和敏感种类间演变,以及春季水华形成的关键因子;SiO_2、WT和N∶P则是主导冬季和夏季,硅藻、隐藻和蓝藻、绿藻间演变的关键因子.
[Abstract]:In order to explore the temporal and spatial variation characteristics of phytoplankton and its influencing factors in subtropical drinking water source reservoirs in China, the monthly monitoring of phytoplankton and 22 hydro-water environmental factors in Tangpu reservoir was carried out in 2011. During the investigation, 115 species of phytoplankton belonging to 62 genera and 7 phyla were identified, among which the most species were chlorophyta, followed by diatoms. During the spring period Shui Hua (April), the cell density of phytoplankton reached the highest level of 20.88 脳 10 ~ (6) cells 路L ~ (1) ~ (-1), then decreased to a minimum of 0.59 脳 10 ~ (6) cells 路L ~ (-1) because of heavy rainfall (June). The temporal heterogeneity of phytoplankton community composition was more obvious than that of spatial heterogeneity, and the results of space-time variance decomposition showed that, The temporal variation accounted for 72.3% of the total variation, which was larger than the spatial variation of only 2.5%, and the dominant species and redundancy analysis showed that diatoms were the most dominant in the whole year, followed by cyanobacteria and cryptoalgae, and then green algae, in which diatoms and cyanobacteria dominated in spring. In summer, cyanobacteria and chlorophyta dominate, while in autumn and winter, diatoms and Cryptophaga dominate HRT, and the change of reservoir ion concentration and denitrification process, which are dominant in spring and autumn, and the evolution between sensitive species and disturbance tolerance. The key factors formed by Shui Hua in spring, such as SiO2WT and N: P, are the key factors that dominate the evolution of diatoms, cryptophyes, cyanobacteria and green algae in winter and summer.
【作者单位】：水利部中国科学院水工程生态研究所水利部水工程生态效应与生态修复重点实验室;绍兴市汤浦水库有限公司;
【基金】：国家自然科学基金项目(51209148,31000188,51279113) 绍兴市重点社会发展科研项目(2011A23005)
【分类号】：X524;X173

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